Octet

Octet / Reagents

Manganese Dioxide

Manganese Dioxide (MnO₂) - oxidizing reagent. Selective oxidation of allylic/benzylic alcohols. Common uses: Allylic alcohol → α,β-unsaturated aldehyde, Benzylic alcohol → Benzaldehyde. Very selective - only oxidizes activated alcohols. Gentle conditions.

Oxidizing

Reagent details

Name

Manganese Dioxide

Formula

MnO₂

Category

Oxidizing

Function

Selective oxidation of allylic/benzylic alcohols

Common Uses

  1. Allylic alcohol → α,β-unsaturated aldehyde

  2. Benzylic alcohol → Benzaldehyde

Notes

Very selective - only oxidizes activated alcohols. Gentle conditions.

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Reagents

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DIBAL-H

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Lindlar Catalyst

Lindlar Catalyst (Pd/CaCO₃/Pb) - reducing reagent. Partial reduction of alkynes to cis-alkenes. Common uses: Alkyne → cis-Alkene (stops at alkene). Poisoned catalyst - lead prevents over-reduction. Syn addition gives cis product.

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Dissolving Metal (Na/NH₃) (Na + NH₃(l)) - reducing reagent. Reduction of alkynes to trans-alkenes. Common uses: Alkyne → trans-Alkene. Birch reduction conditions. Liquid ammonia at -33°C. Radical mechanism gives trans product.

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